WO2010081377A1 - Ball milling method for preparation of hard alloy mixture - Google Patents

Ball milling method for preparation of hard alloy mixture Download PDF

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Publication number
WO2010081377A1
WO2010081377A1 PCT/CN2009/076228 CN2009076228W WO2010081377A1 WO 2010081377 A1 WO2010081377 A1 WO 2010081377A1 CN 2009076228 W CN2009076228 W CN 2009076228W WO 2010081377 A1 WO2010081377 A1 WO 2010081377A1
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Prior art keywords
ball
powder
ball milling
diameter
milling process
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PCT/CN2009/076228
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French (fr)
Chinese (zh)
Inventor
李衍军
钟娟妹
刘志芳
胡松
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江西稀有稀土金属钨业集团有限公司
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Priority to CN2009801546246A priority Critical patent/CN102202817B/en
Priority to AU2009337569A priority patent/AU2009337569B2/en
Priority to EP09838164A priority patent/EP2380684A1/en
Priority to US13/144,699 priority patent/US8584975B2/en
Priority to JP2011545615A priority patent/JP5409810B2/en
Publication of WO2010081377A1 publication Critical patent/WO2010081377A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1084—Alloys containing non-metals by mechanical alloying (blending, milling)
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/042—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling using a particular milling fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling

Definitions

  • the present invention relates to a ball milling process for preparing a cemented carbide mixture, particularly a stirred ball milling process prepared from a WC-Co ultrafine hard alloy mixture.
  • tungsten carbide in this patent specification refers to tungsten carbide powder with a particle size between 0.3 and 0.8 ⁇ m.
  • cemented carbide mixture is one of the important processes in the production of cemented carbide. Its purpose is to prepare powders of various carbides and cemented metals into a certain mixture of components and a certain particle size. Good or bad is an important aspect of determining the quality of cemented carbide.
  • the process has the disadvantages of high noise, high energy consumption and low efficiency.
  • the present invention provides a ball milling process for preparing a cemented carbide mixture, characterized in that the crucible is subjected to a stirring ball milling process in which a crucible having a diameter of 4 to 6 mm is used.
  • the ball, the positive and negative deviation of the diameter of the alloy ball is ⁇ 0.1 mm; the tungsten carbide powder and the cobalt powder having a diameter of 0.3 to 0.8 ⁇ m are used; the alcohol is used as the grinding medium; and the paraffin is used as the molding agent.
  • the rotation speed of the stirring arm is 100 to 135 rpm, and the ball milling time is 6 to 8 hours.
  • the amount of alcohol added is 500 to 800 ml/Kg.
  • the paraffin is added in an amount of from 1.5 wt% to 2.5 wt%.
  • the ball-to-material ratio between the cemented carbide sphere and the tungsten carbide powder and the cobalt powder is 3:1.
  • the agitating ball milling process for preparing a mixture of ultrafine cemented carbides of the present invention comprises: using ultrafine tungsten carbide powder and ultrafine cobalt powder; having a diameter of 46 mm and a cobalt content of 8 wt% Alloy ball, the positive and negative diameter deviation of the alloy ball is ⁇ 0.1mm; using alcohol as grinding medium, the amount is 600 800ml/Kg; adding 1. 5 ⁇ 1% 2.5 ⁇ 1% paraffin as molding agent; The ratio is 3:1; the speed of the stirring arm is 100 135 rpm; the ball milling time is 6 8h.
  • the diameter ⁇ of the alloy ball is 46 mm, which is relatively small, the specific surface of the grinding ball is larger than that of the conventional grinding rod, and the relative movement of the ball is increased as the speed of the agitator increases. Thereby, the grinding effect of the alloy ball on the powder is increased, the ball milling space of the mixture is greatly shortened, and the running noise of the device is small.
  • Example 1 An ultrafine (powder particle size of 0.3 ⁇ ) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size ⁇ 1.00 ⁇ m) were used, and the powder ratio was 93 wt% WC ten 6 wt% Co + lwt% ( Cr 3 C 2 + VC) diameter of D4mm cemented carbide ball, alloy ball diameter deviation ⁇ 0.1 with alcohol as grinding medium, adding 750ml / Kg, adding 2.5 ⁇ % paraffin as a molding agent, ball The ratio is 3:1, the stirring arm rotates at 135 rpm, and the ball milling is 8 h.
  • WC tungsten carbide
  • VC ultrafine cobalt powder
  • Example 2 Ultrafine (powder particle size of 0.3 ⁇ ) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size ⁇ 1 ⁇ 0 ⁇ ), the ratio of the powder was 91 wt% WC ten 8 wt% Co + lwt% ( Cr 3 C 2 + VC) diameter of D4mm cemented carbide ball, alloy ball diameter deviation ⁇ 0.1 with alcohol as grinding medium, adding 800ml / Kg, adding 2.5 ⁇ % paraffin as a molding agent, ball The ratio is 3:1, the rotation speed of the stirring arm is 130 rpm, and the ball milling process is 8 h.
  • Example 3 Ultrafine (powder size 0.6 ⁇ ) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size ⁇ 1.00 ⁇ m), powder ratio of 93.5 wt% WC ten 6 wt% Co + 0.5 Wt% (Cr 3 C 2 + VC), carbide ⁇ 5 ⁇ diameter, alloy ball diameter deviation ⁇ 0.1 with alcohol as grinding medium, adding 700ml / Kg, adding 2.5 ⁇ % paraffin for molding The ball-to-material ratio was 3:1, the stirring arm was rotated at 130 rpm, and the ball milling was 7.0 h.
  • Example 4 Ultrafine (powder particle size of 0.8 ⁇ ) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size ⁇ 1.0 ⁇ ), powder ratio of 89.5 wt% WC + 10 wt% Co + 0.5 wt% (Cr 3 C 2 + VC diameter D6mm carbide ball, alloy ball diameter soil deviation ⁇ 0.1 with alcohol for research Grinding medium, adding 650ml/Kg, adding 2.0%% paraffin as molding agent, the ratio of ball to material is 3:1, the rotation speed of the stirring arm is 110 rpm, and the ball milling process is 6h.
  • Example 5 Ultrafine (powder particle size of 0. 8 ⁇ ) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size ⁇ 1 ⁇ 0 ⁇ ), the powder ratio of 91.5wt% WC ten 8wt %Co + 0.5wt% (Cr 3 C 2 + VC)
  • the diameter of the cemented carbide sphere with the diameter of ⁇ 5 ⁇ and the diameter of the alloy sphere is ⁇ 0.1, using alcohol as the grinding medium, adding 600ml/Kg, adding 2.0%% paraffin as the molding agent, the ratio of ball to material is 3: 1.
  • the stirring arm rotates at a speed of 100 rpm, and the ball mill is a 6-hour agitating ball milling process.

Abstract

A ball milling method for preparation of hard alloy mixture utilizes a stirring-ball-milling technique in which the balls of hard alloy with the diameter of 4 to 6 mm are used. The plus-minus deviation of the diameter of the hard alloy ball is less than or equal to 0.1 mm. WC powder with particle size of 0.3 to 0.8 μm and ultra fine Co powder are used as raw materials. Alcohol is used as grinding medium while olefin is used as forming agent. Said method has the advantages of high ball milling efficiency, low energy consumption, easy mass production and so on, and can be widely used in the preparation of hard alloy mixture.

Description

说明书 硬质合金混合料制备的球磨工艺  Ball milling process for preparing cemented carbide mixture
技术领域  Technical field
技术领域  Technical field
[1] 本发明涉及一种硬质合金混合料制备的球磨工艺， 特别是 WC - Co超细硬质合 金混合料制备的搅拌球磨工艺。  [1] The present invention relates to a ball milling process for preparing a cemented carbide mixture, particularly a stirred ball milling process prepared from a WC-Co ultrafine hard alloy mixture.
[2] 本专利说明书中的术语"超细碳化钨"是指粒度在 0.3〜0.8μηι之间的碳化钨粉末[2] The term "ultrafine tungsten carbide" in this patent specification refers to tungsten carbide powder with a particle size between 0.3 and 0.8 μm.
， 而"超细钴粉"是指粒 < l.(^m的钴粉末。 , and "ultrafine cobalt powder" means a cobalt powder of < l. (^m.
背景技术  Background technique
背景技术  Background technique
[3] 硬质合金混合料的制备是硬质合金生产中的重要工序之一， 其目的在于将各种 碳化物和胶结金属的粉末配制成一定成分、 一定粒度的均匀混合物， 此工序质 量的好坏是决定硬质合金质量的一个重要方面。  [3] The preparation of cemented carbide mixture is one of the important processes in the production of cemented carbide. Its purpose is to prepare powders of various carbides and cemented metals into a certain mixture of components and a certain particle size. Good or bad is an important aspect of determining the quality of cemented carbide.
[4] 目前， 国内在制备超细硬质合金混合料吋均釆用可倾式滚动球磨的生产工艺。 [4] At present, the production process of tilting rolling ball mill is used in the preparation of ultra-fine cemented carbide mixes in China.
该工艺具有噪音大、 能耗大、 效率低等不足。  The process has the disadvantages of high noise, high energy consumption and low efficiency.
对发明的公开  Disclosure of invention
发明内容  Summary of the invention
[5] 本发明的目的是提供一种硬质合金的混合料制备的球磨工艺， 其噪音小、 能耗 低、 效率高。  [5] It is an object of the present invention to provide a ball milling process for the preparation of a mixture of cemented carbides which has low noise, low energy consumption and high efficiency.
[6] 为达到上述目的， 本发明提供了一种硬质合金混合料制备的球磨工艺， 其特征 在于， 釆用搅拌球磨工艺， 在该工艺中， 釆用直径为 4〜6mm的硬质合金圆球， 该合金球直径的正负偏差≤0.1mm; 釆用直径为 0.3〜0.8μηι的碳化钨粉末和钴粉 ； 用酒精作研磨介质； 并且用石蜡作成型剂。  [6] In order to achieve the above object, the present invention provides a ball milling process for preparing a cemented carbide mixture, characterized in that the crucible is subjected to a stirring ball milling process in which a crucible having a diameter of 4 to 6 mm is used. The ball, the positive and negative deviation of the diameter of the alloy ball is ≤0.1 mm; the tungsten carbide powder and the cobalt powder having a diameter of 0.3 to 0.8 μm are used; the alcohol is used as the grinding medium; and the paraffin is used as the molding agent.
[7] 优选地， 搅拌臂的转速为 100〜135转 /分钟， 球磨吋间为 6〜8h。  [7] Preferably, the rotation speed of the stirring arm is 100 to 135 rpm, and the ball milling time is 6 to 8 hours.
[8] 优选地， 酒精的加量为 500〜800ml/Kg。  [8] Preferably, the amount of alcohol added is 500 to 800 ml/Kg.
[9] 优选地， 石蜡的加量为 1.5 wt%〜2.5wt%。  [9] Preferably, the paraffin is added in an amount of from 1.5 wt% to 2.5 wt%.
[10] 优选地， 硬质合金圆球与碳化钨粉末和钴粉之间的球料比为 3:1。 [11] 特别是， 本发明的超细硬质合金的混合料制备搅拌球磨工艺包括： 釆用超细碳 化钨粉末和超细钴粉； 直径为 4 6mm、 含钴量为 8wt%的硬质合金圆球， 合金球 的直径正负偏差为≤0.1mm; 用酒精作研磨介质， 加量为 600 800ml/Kg; 加入 1. 5\¥1% 2.5\¥1%石蜡作成型剂； 球料比为 3:1 ; 搅拌臂的转速为 100 135转 /分钟 ； 球磨吋间为 6 8h的搅拌球磨工艺。 [10] Preferably, the ball-to-material ratio between the cemented carbide sphere and the tungsten carbide powder and the cobalt powder is 3:1. [11] In particular, the agitating ball milling process for preparing a mixture of ultrafine cemented carbides of the present invention comprises: using ultrafine tungsten carbide powder and ultrafine cobalt powder; having a diameter of 46 mm and a cobalt content of 8 wt% Alloy ball, the positive and negative diameter deviation of the alloy ball is ≤0.1mm; using alcohol as grinding medium, the amount is 600 800ml/Kg; adding 1. 5\¥1% 2.5\¥1% paraffin as molding agent; The ratio is 3:1; the speed of the stirring arm is 100 135 rpm; the ball milling time is 6 8h.
[12] 由于合金球的直径 Φ为 4 6mm， 比较小， 因而研磨球的比表面比传统的研磨 棒的比表面大， 且球磨吋随着搅拌器的转速提高， 合金球的相对运动加剧， 从 而增加了合金球对粉末的研磨效果， 大大地缩短了混合料的球磨吋间， 且设备 的运行噪音很小。  [12] Since the diameter Φ of the alloy ball is 46 mm, which is relatively small, the specific surface of the grinding ball is larger than that of the conventional grinding rod, and the relative movement of the ball is increased as the speed of the agitator increases. Thereby, the grinding effect of the alloy ball on the powder is increased, the ball milling space of the mixture is greatly shortened, and the running noise of the device is small.
具体实施例  Specific embodiment
实施例 1 : 釆用超细 （粉末粒度为 0.3μηι) 碳化钨 （WC) 粉末和超细钴粉 （粉 末粒度 < 1·0μηι) ， 粉末的配比为 93wt%WC十 6wt%Co+ lwt% (Cr3C2 + VC) 直径为D4mm的硬质合金圆球、 合金球的直径土偏差为≤0.1 用酒精作研磨介 质， 加量为 750ml/Kg， 加入 2.5^%石蜡作成型剂， 球料比为 3:1， 搅拌臂的转速 为 135转 /分钟， 球磨吋间为 8h的搅拌球磨工艺。 Example 1: An ultrafine (powder particle size of 0.3 μηι) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size <1.00 μm) were used, and the powder ratio was 93 wt% WC ten 6 wt% Co + lwt% ( Cr 3 C 2 + VC) diameter of D4mm cemented carbide ball, alloy ball diameter deviation ≤ 0.1 with alcohol as grinding medium, adding 750ml / Kg, adding 2.5 ^% paraffin as a molding agent, ball The ratio is 3:1, the stirring arm rotates at 135 rpm, and the ball milling is 8 h.
实施例 2: 釆用超细 （粉末粒度为 0.3μηι) 碳化钨 （WC) 粉末和超细钴粉 （粉 末粒度 < 1·0μηι) ， 粉末的配比为 91wt%WC十 8wt%Co+ lwt% (Cr3C2 + VC) 直径为D4mm的硬质合金圆球、 合金球的直径土偏差为≤0.1 用酒精作研磨介 质， 加量为 800ml/Kg， 加入 2.5^%石蜡作成型剂， 球料比为 3:1， 搅拌臂的转速 为 130转 /分钟， 球磨吋间为 8h的搅拌球磨工艺。 Example 2: Ultrafine (powder particle size of 0.3 μηι) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size <1·0μηι), the ratio of the powder was 91 wt% WC ten 8 wt% Co + lwt% ( Cr 3 C 2 + VC) diameter of D4mm cemented carbide ball, alloy ball diameter deviation ≤ 0.1 with alcohol as grinding medium, adding 800ml / Kg, adding 2.5 ^% paraffin as a molding agent, ball The ratio is 3:1, the rotation speed of the stirring arm is 130 rpm, and the ball milling process is 8 h.
实施例 3: 釆用超细 （粉末粒度为 0.6μηι) 碳化钨 （WC) 粉末和超细钴粉 （粉 末粒度 < 1·0μηι) ， 粉末的配比为 93.5wt%WC十 6wt%Co + 0.5wt% (Cr3C2 + VC) ， 直径为 Φ5ηιηι的硬质合金圆球、 合金球的直径土偏差为≤0.1 用酒精作研磨 介质， 加量为 700ml/Kg， 加入 2.5^%石蜡作成型剂， 球料比为 3:1， 搅拌臂的转 速为 130转 /分钟， 球磨吋间为 7.0h的搅拌球磨工艺。 Example 3: Ultrafine (powder size 0.6 μηι) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size <1.00 μm), powder ratio of 93.5 wt% WC ten 6 wt% Co + 0.5 Wt% (Cr 3 C 2 + VC), carbide Φ5ηιηι diameter, alloy ball diameter deviation ≤ 0.1 with alcohol as grinding medium, adding 700ml / Kg, adding 2.5 ^% paraffin for molding The ball-to-material ratio was 3:1, the stirring arm was rotated at 130 rpm, and the ball milling was 7.0 h.
实施例 4: 釆用超细 （粉末粒度为 0.8μηι) 碳化钨 （WC) 粉末和超细钴粉 （粉 末粒度 < 1.0μηι) ， 粉末的配比为 89.5wt%WC+ 10wt%Co + 0.5wt% (Cr3C2 + VC 直径为D6mm的硬质合金圆球、 合金球的直径土偏差为≤0.1 用酒精作研 磨介质， 加量为 650ml/Kg， 加入 2.0^%石蜡作成型剂， 球料比为 3:1， 搅拌臂的 转速为 110转 /分钟， 球磨吋间为 6h的搅拌球磨工艺。 Example 4: Ultrafine (powder particle size of 0.8 μηι) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size < 1.0 μηι), powder ratio of 89.5 wt% WC + 10 wt% Co + 0.5 wt% (Cr 3 C 2 + VC diameter D6mm carbide ball, alloy ball diameter soil deviation ≤ 0.1 with alcohol for research Grinding medium, adding 650ml/Kg, adding 2.0%% paraffin as molding agent, the ratio of ball to material is 3:1, the rotation speed of the stirring arm is 110 rpm, and the ball milling process is 6h.
[17] 实施例 5: 釆用超细 （粉末粒度为 0·8μηι) 碳化钨 （WC) 粉末和超细钴粉 （粉 末粒度 < 1·0μηι) ， 粉末的配比为 91.5wt%WC十 8wt%Co + 0.5wt% (Cr3C2 + VC)[17] Example 5: Ultrafine (powder particle size of 0. 8μηι) tungsten carbide (WC) powder and ultrafine cobalt powder (powder size <1·0μηι), the powder ratio of 91.5wt% WC ten 8wt %Co + 0.5wt% (Cr 3 C 2 + VC)
， 直径为 Φ5ηιηι的硬质合金圆球、 合金球的直径土偏差为≤0.1皿， 用酒精作研磨 介质， 加量为 600ml/Kg， 加入 2.0^%石蜡作成型剂， 球料比为 3:1， 搅拌臂的转 速为 100转 /分钟， 球磨吋间为 6h的搅拌球磨工艺。 The diameter of the cemented carbide sphere with the diameter of Φ5ηιηι and the diameter of the alloy sphere is ≤0.1, using alcohol as the grinding medium, adding 600ml/Kg, adding 2.0%% paraffin as the molding agent, the ratio of ball to material is 3: 1. The stirring arm rotates at a speed of 100 rpm, and the ball mill is a 6-hour agitating ball milling process.
[18] 以上通过若干实施例对本发明进行了说明。 应该理解， 根据所公幵的内容， 本 领域的技术人员可以做成这样或那样的修改、 变化、 完善、 和 /或替换， 然而， 这样做都将落入所附权利要求书的保护范围之内。 [18] The invention has been described above by means of several embodiments. It is to be understood that those skilled in the art can make modifications, variations, improvements, and/or substitutions in accordance with the teachings of the present invention. However, it will fall within the scope of the appended claims. Inside.

Claims

权利要求书 Claim
一种硬质合金混合料制备的球磨工艺， 其特征在于， 釆用搅拌球 磨工艺， 在该工艺中， 釆用直径为 4〜6mm的硬质合金圆球， 该合 金球直径的正负偏差≤0.1mm; 釆用晶粒度为 0.3〜0.8μηι的碳化钨 粉末和晶粒度 < 1.0μηι的超细钴粉； 用酒精作研磨介质； 并且用石 蜡作成型剂。 A ball milling process for preparing a cemented carbide mixture, characterized in that the crucible is subjected to a stirring ball milling process, in which a crucible ball having a diameter of 4 to 6 mm is used, and the positive and negative deviation of the diameter of the alloy ball is ≤ 0.1 mm; tungsten carbide powder having a grain size of 0.3 to 0.8 μηι and ultrafine cobalt powder having a grain size of <1.0 μη; using alcohol as a grinding medium; and using paraffin as a molding agent.
如权利要求 1所述的硬质合金混合料制备的球磨工艺， 其特征在于 ， 搅拌臂的转速为 100〜135转 /分钟， 球磨吋间为 6〜8h。 The ball milling process for preparing a cemented carbide mixture according to claim 1, wherein the stirring arm has a rotation speed of 100 to 135 rpm, and the ball mill is 6 to 8 hours.
如权利要求 1所述的硬质合金混合料制备的球磨工艺， 其特征在于 ， 酒精的加量为 500〜800ml/Kg。 A ball milling process for preparing a cemented carbide mixture according to claim 1, wherein the amount of the alcohol added is 500 to 800 ml/kg.
如权利要求 1所述的硬质合金混合料制备的球磨工艺， 其特征在于 ， 石蜡的加量为 1.5 wt%〜2.5wt%。 A ball milling process for preparing a cemented carbide mixture according to claim 1, wherein the paraffin wax is added in an amount of from 1.5 wt% to 2.5 wt%.
如权利要求 1所述的硬质合金混合料制备的球磨工艺， 其特征在于 ， 硬质合金圆球与碳化钨粉末和钴粉之间的球料比为 3:1。 A ball milling process for preparing a cemented carbide mixture according to claim 1, wherein the ball-to-material ratio between the cemented carbide ball and the tungsten carbide powder and the cobalt powder is 3:1.
PCT/CN2009/076228 2009-01-16 2009-12-30 Ball milling method for preparation of hard alloy mixture WO2010081377A1 (en)

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